Backward shifting and accelerating synchronous control system for a remote-controlled toy car

ABSTRACT

A backward shifting and accelerating synchronous control system installed in a remote-controlled gasoline engine toy car and controlled by a remote controller to move the toy car backwards and to accelerate the speed. The system includes an accelerator control unit held in position by a torsional spring and turned to control the oil flow rate of the backward steering accelerating oil valve of the engine of the toy car, a swivel arm, the swivel arm having a first end coupled to the forward/backward steering control mechanism of the gasoline engine toy car by a first link and a second end coupled to the accelerator control unit by a second link, and a server controlled by a remote controller to turn the swivel arm, to further shift the forward/backward steering control mechanism to the backward steering mode and drive the accelerator control unit to open the backward steering accelerating oil valve of the engine of the toy car.

BACKGROUND OF THE INVENTION

[0001] The present invention relates to a remote-controlled toy car and,more specifically, to a backward shifting and accelerating synchronouscontrol system for a remote-controlled toy car.

[0002] Regular remote-controlled gasoline engine toy cars can becontrolled to move forwards and backwards, to change the steeringdirection, and to accelerate the speed when changed the direction of thefront wheels or shifted the gear to the backward mode. According toconventional designs, three separate servers are used to achieve thethree actions of a regular remote-controlled gasoline engine toy car,namely, the action of changing the steering direction of the frontwheels, the action of forwards/backwards shifting, and the action ofaccelerating the speed when shifting the gear to backward movement.These three servers each have a swivel arm, and a link, which connectsthe swivel arm to the front wheel turning mechanism, theforward/backward shifting gear, or the accelerator. A remote controllercontrols these three servers to achieve the aforesaid three actions.Because three servers are used, only a high-level remote controller canachieve the job of controlling the servers to achieve the desiredactions. However, a high-level remote controller is complicated andexpensive.

SUMMARY OF THE INVENTION

[0003] The present invention has been accomplished under thecircumstances in view. It is the main object of the present invention toprovide a backward shifting and accelerating synchronous control systemfor a remote-controlled gasoline engine toy car, which uses one singleserver to simultaneously control the shifting of backward gear and theopening of the backward steering control oil valve of the gasolineengine toy car, enabling the toy car to be simultaneously acceleratedwhen shifted to the backward steering mode. According to one aspect ofthe present invention, the backward shifting and acceleratingsynchronous control system is installed in a remote-controlled gasolineengine toy car and controlled by a remote controller to move the toy carbackwards and to accelerate the speed, comprising an accelerator controlunit held in position by a torsional spring and turned to control theoil flow rate of the backward steering accelerating oil valve of theengine of the toy car, a swivel arm, the swivel arm having a first endcoupled to the forward/backward steering control mechanism of thegasoline engine toy car by a first link and a second end coupled to theaccelerator control unit by a second link, and a server controlled by aremote controller to turn the swivel arm, to further shift theforward/backward steering control mechanism to the backward steeringmode and drive the accelerator control unit to open the backwardsteering accelerating oil valve of the engine of the toy car. Accordingto another aspect of the present invention, the accelerator control unitcomprises a swivel arm coupled to the backward steering accelerating oilvalve of the engine of the toy car through a link, and driving memberdriven by the server to turn the swivel arm and to further open thebackward steering accelerating oil valve of the engine of the toy car.

BRIEF DESCRIPTION OF THE DRAWINGS

[0004]FIG. 1 is an exploded view of the accelerator control unitaccording to the present invention.

[0005]FIG. 2 is a sectional view of the present invention, showing theforward/backward steering control mechanism shifted to the forwardsteering mode, the backward steering accelerating oil valve of theengine closed.

[0006]FIG. 3 is similar to FIG. 2 but showing the forward/backwardsteering control mechanism shifted to the backward steering mode, thebackward steering accelerating oil valve of the engine opened.

[0007]FIG. 4 is a schematic drawing showing the adjustment screw movedwith the swivel arm of the accelerator control unit relative to thefront protruded portion of the top block of the base frame.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0008] Referring to FIGS. 1 and 2, a backward shifting and acceleratingsynchronous control system for a remote-controlled toy car in accordancewith the present invention comprises an accelerator control unit 1. Theaccelerator control unit 1 comprises a base frame 10, a torsional spring11, a swivel arm 12, a first rivet element 13, a driving member 15, anda second rivet element 16. The base frame 10 comprises a top block 101and two upright rods 102 bilaterally disposed in front of the top block101. The top block 101 comprises two top screw holes 1011, and a frontprotruded portion 1012. The upright rods 102 each have a top screw hole1021. The swivel arm 12 is an elongated rod member comprising a verticalpivot hole 120 disposed at one end thereof, a longitudinal series ofvertical through holes 121 disposed at the other end thereof, and abottom lug 122 disposed at the bottom side and spaced between the pivothole 120 and the through holes 121. The bottom lug 122 has a horizontalscrew hole 1221, and an adjustment screw 123 threaded into thehorizontal screw hole 1221 and adapted to limit the swinging angle ofthe swivel arm 12. The first rivet element 13 comprises a body 130inserted into the vertical pivot hole 120 of the swivel arm 12, and athrough hole 131 axially extended through the center of the body 130. Ascrew 14 is inserted through the through hole 131 of the first rivetelement 13 and threaded into the top screw hole 1021 of one upright rod102 of the base frame 10 to secure the swivel arm 12 to the base frame10, enabling the swivel arm 12 to be turned about the first rivetelement 13. The torsional spring 11 is mounted on one upright rod 102(to which the swivel arm 12 is pivoted), having one end connected to theswivel arm 12 and the other end connected to one side of the frontprotruded portion 1012 of the top block 101 of the base frame 10. Whenturning the swivel arm 12 about the first rivet element 13, theadjustment screw rod 123 will touch one side of the front protrudedportion 1012 of the top block 101 of the base frame 10 to limit theturning angle of the swivel arm 12 (see FIG. 4). The driving member 15comprises a barrel-like body 150 defining an axial center through hole1501, two horizontal arms 151 perpendicularly extended from theperiphery of the barrel-like body 150 at two sides at differentelevations and extended in X-axis direction, and two horizontal wings152 perpendicularly extended from the periphery of the barrel-like body150 at two sides and extended in Y-axis direction. The horizontal arms151 each have a longitudinal series of through holes 1511. Thehorizontal wings 152 each have a front protruded portion 1521. Thesecond rivet element 16 comprises a body 160 inserted into the axialcenter through hole 1501 of the barrel-like body 150 of the drivingmember 15, and a through hole 161 axially extended through the center ofthe body 160. A screw 17 is inserted through the through hole 161 of thesecond rivet element 16 and threaded into one top screw hole 1011 of thetop block 101 to secure the driving member 15 to the base frame 10,enabling the driving member 15 to be turned about the second rivetelement 16.

[0009]FIG. 2 shows the aforesaid accelerator control unit 1 assembled,and installed with a forward/backward steering control mechanism 2, afirst server 3, a second server 4, and an engine 5 in the frame body ofthe remote-controlled toy car.

[0010] The forward/backward steering control mechanism 2 comprises atransmission shaft 21 coupled between the front wheel system and rearwheel system (not shown) of the toy car and revolvably supported onbearings (not shown), the transmission shaft 21 having a polygonalsegment 211, a first transmission gear wheel 23 and a secondtransmission gear wheel 26 respectively revolvably mounted on thetransmission shaft 21 at two sides of the polygonal segment 211, thetransmission gear wheel 23 comprising an external gear 231 and aninternal gear 232, the second transmission gear wheel 26 comprising anexternal gear 261 and an internal gear 262, a driven gear 22 fixedlymounted on the first transmission gear wheel 23 for synchronousrotation, a driving gear 51 coupled to the engine 5 of the toy car andmeshed with the driven gear 22, a movable gear 24 longitudinallyslidably mounted on the polygonal segment 211 of the transmission shaft21 and prohibited from rotary motion relative to the transmission shaft21 (the movable gear 24 has a polygonal center hole fitting thepolygonal cross-section of the polygonal segment 211, so that themovable gear 24 is prohibited from rotary motion relative to thetransmission shaft 21), the movable gear 24 comprising a series of teeth241 around the periphery, the movable gear 24 being moved along thepolygonal segment 211 of the transmission shaft 21 between a firstposition where the teeth 241 are forced into engagement with theinternal gear 232 of the first transmission gear wheel 23 for enablingthe transmission shaft 21 to be rotated with the first transmission gearwheel 23, and a second position where the teeth 241 are disengaged fromthe internal gear 232 of the first transmission wheel 23 and forced intoengagement with the internal gear 262 of the second transmission gearwheel 26, preventing a rotation of the transmission shaft 21 with thefirst transmission gear wheel 23, a first idle gear 25 meshed with theexternal gear 231 of the first transmission gear wheel 23, and a secondidle gear 26 meshed between the first idle gear 25 and the external gear261 of the second transmission gear wheel 26.

[0011] Referring to FIG. 2 again, the aforesaid first server 3 comprisesa swivel arm 31, a first link 32 coupled between one end of the swivelarm 31 and the movable gear 24, and a second link 33 coupled between theother end of the swivel arm 31 and one through hole 1511 of onehorizontal arm 151 of the driving member 15. Further, a link 53 iscoupled between the backward steering accelerating oil valve 52 of theengine 5 and one through hole 121 of the swivel arm 12. The aforesaidsecond server 4 comprises a swivel arm 41, and a link 42 coupled betweenthe swivel arm 41 and the front wheel steering control mechanism (notshown). By means of controlling the second server 4 to turn the swivelarm 41, the link 42 is driven to move the front wheel steering controlmechanism, causing it to change turn the front wheels to the desireddirection.

[0012] The present invention uses a remote controller to control theoperation of the first server 3 and the second server 4, to further movethe swivel arms 31 and 41 and the related links 32, 33 and 42. Whenstarting the engine 5 to rotate the driving gear 51 after the movablegear 24 has been shifted to the position shown in FIG. 3, the drivengear 22 is driven to rotate first transmission gear wheel 23 clockwise,causing it to rotate the first idle gear 25 counter-clockwise, andtherefore the second idle gear 27 is rotated clockwise to further rotatethe second transmission gear wheel 26 counter-clockwise, thereby causingthe transmission shaft 21 to rotate counter-clockwise and to move thetoy car backwards. When in the state shown in FIG. 3, the swivel arm 31moves the first link 32 and the second link 33 of the first server 3,causing the second link 33 to turn the driving member 15 in suchdirection that the protruded portion 1521 of one wing 152 of the drivingmember 15 pushes the swivel arm 12 to pull open the backward steeringaccelerating oil valve 52 wider, so as to accelerate the speed whenmoving the toy car backwards.

[0013] On the contrary, when moving the movable gear 24 to the positionas shown in FIG. 2, the movable gear 24 is meshed with the internal gear232 of the first transmission gear wheel 23 and rotated with the firsttransmission gear wheel 23 clockwise by the driving gear 22, theinternal gear 232 of the transmission gear wheel 23 rotates thetransmission shaft 20 clockwise to move the toy car forwards. At thistime the first idle gear 25, the second idle gear 27 and the secondtransmission gear wheel 26 run idle, and the driving member 15 is turnedback to its former position by the second link 33, enabling the rockerarm 12 to be forced back by the torsional spring 11 to release thebackward steering accelerating oil valve 52.

[0014] Because the design of the present invention simply uses oneserver to achieve forward and backward moving control as well asbackward moving and accelerating control, the whole structure of the toycar is relatively simple, and the manufacturing cost of the toy car isrelatively cheap.

[0015] While only one embodiment of the present invention has been shownand described, it will be understood that various modifications andchanges could be made thereunto without departing from the spirit andscope of the invention disclosed.

What the invention claimed is:
 1. A backward shifting and acceleratingsynchronous control system installed in a remote-controlled gasolineengine toy car having a gasoline engine with a backward steeringaccelerating oil valve and controlled by a remote controller to movesaid toy car backwards and to accelerate the speed, comprising: a serverunit, said server unit comprising a swivel arm, the swivel arm of saidserver unit having a first end and a second end, a server controlled toturn the swivel arm of said server unit forwards and backwards, a firstlink coupled between the first end of the swivel arm of said server unitand the forward/backward steering control mechanism of said gasolineengine toy car, a second link coupled to the second end of the swivelarm of said server unit; and an accelerator control unit coupled to oneend of the second link said server unit remote from the swivel arm andadapted to control the oil flow rate of the backward steeringaccelerating oil valve of the engine of said gasoline engine toy car,said accelerator control unit comprising a base frame, a swivel armpivoted to said base frame and coupled to the backward steeringaccelerating oil valve of the engine of said gasoline engine toy car andturned to close/open the backward steering accelerating oil valve of theengine of said gasoline engine toy car, a link coupled between one endof the swivel arm of said accelerator control unit and the backwardsteering accelerating oil valve of the engine of said gasoline enginetoy car and driven by the swivel arm of said accelerator control unit tocontrol the oil flow rate of the backward steering accelerating oilvalve of the engine of said gasoline engine toy car, a driving memberpivoted to said base frame and coupled to one end of the second link ofsaid server unit and driven by the second link of said server unit toturn the swivel arm of said accelerator control unit to regulate the oilflow rate of the backward steering accelerating oil valve of the engineof said gasoline engine toy car.
 2. The backward shifting andaccelerating synchronous control system of claim 1, wherein said baseframe comprises a front protruded portion; the swivel arm of saidaccelerator control unit comprises a bottom lug, said bottom lugcomprising a horizontal screw hole, and an adjustment screw threadedinto the screw hole of said bottom lug and adapted to act with the frontprotruded portion of said base frame to limit the turning angle of theswivel arm of said accelerator unit.
 3. The backward shifting andaccelerating synchronous control system of claim 1, wherein saidaccelerator control unit further comprises a torsional spring adapted toreturn the swivel arm of said accelerator unit after each action.
 4. Thebackward shifting and accelerating synchronous control system of claim1, wherein the swivel arm of said accelerator control unit comprises aseries of through holes longitudinally arranged at a free end thereofand selectively connected to one end of the link of said acceleratorcontrol unit.
 5. The backward shifting and accelerating synchronouscontrol system of claim 1, wherein said driving member comprises abarrel comprising a barrel-like body pivoted to said base frame, twohorizontal arms perpendicularly extended from the periphery of saidbarrel-like body at two sides at different elevations and extended inX-axis direction and selectively coupled to the second link of saidserver, and two horizontal wings perpendicularly extended from theperiphery of said barrel-like body at two sides and extended in Y-axisdirection and adapted to move the swivel arm of said accelerator controlunit, said horizontal wings each having a front protruded portionadapted to move the swivel arm of said accelerator control unit.
 6. Thebackward shifting and accelerating synchronous control system of claim5, wherein said horizontal arms each have a longitudinal series ofthrough holes for the connection of the second link of said serverselectively.